Thief 2: The Metal Age Easter Egg - Gold Skull

1 Go to the level (blackmail)

2 When you start the mission hop all the gates to your right, all of them once you can't go any farther look for bushes, behind the bushes is a hole. Go through the hole and keep going til you see a river.
Go in the river and go with the current till you see a bridge. Get out of the river and go through the gate, and go to your right and open the gate. Then keep going tothe other gate and open it, then go in the door. You immediately see there should be a big hammer in that room and a small hammer over that AND HIT IT WITH AN ARROW, then the hammer will move. Go down the hole and go through the maze to get the skull. (WATCH OUT THERE IS A DEAD HAMMER KNIGHT THERE.)